Die stamp



Oct. 27, 1959 c. PRIESMEYER DIE STAMP Filed March 27, 1956 INVENTOR:CHARLES PRIESMEYER FIGZ ATT'Y 2,909,817 Patented Oct. 27, 1959 DIE STAMPCharles Priesmeyer, Park Ridge, 111., assignor to Meyer- Wenthe, Inc.,Chicago, 111., a corporation of Illinois Application March 27, 1956,Serial No. 574,238

5 Claims. (Cl. 22-67) This invention relates to die stamps and moreparticularly to a device for making male reverse or counter dies frommatrix dies as used in corporate, notary and other seals.

It is often desirable to obtain male reverse or counter dies ofimpression seals in order to form raised imprints on documents. However,there has been heretofore no standard or inexpensive equipment for sucha procedure. The process has required cumbersome machinery and theexpenditure of considerable effort as well as a waste of materials.

It is accordingly an object of the present invention to provide a diestamp for making alloy metal male reverse or counter dies from the brassmatrix dies which are used for corporate and notary seals.

Another object of the invention is to provide a device of the typeindicated which is portable and can be easily used in various locationsand service centers without the need for special skills on the part ofthe operator.

Another object of the invention is to provide a die stamp of the typeindicated which is extremely compact and simple in construction adaptedto protect the operator from molten metal which may be splashed in theprocess of making the male reverse or counter die.

Another object of the invention is to provide a die stamp from which thesplashed molten metal may be readily removed. 7

Another object is to provide means for centering the brass matrix die inrelation to the metal to be stamped so that the matrix die will beguided in perpendicular relationship to the molten metal to form aperfectly even, uniformly level andprecisely matched counter die.

Another object is to provide means for quickly supporting and guidingthe matrix die for use with but slight effort on the part of theoperator.

Other objects and advantages will become apparent as the descriptionproceeds in accordance with the drawings in which:

Fig. 1 is a vertical sectional view of the die stamp according to theinvention taken through the line 11 of Fig. 2; and I Fig. 2 is a topplan view of the die stamp.

Referring now to Fig. 1 the die stamp 10 comprises a circular metal base12 of a suitably heat resistant material, a dome shaped cover 14 ofsimilar material having a central guide boss 16 in the top thereofformed integrally therewith to support a plunger 18 slidably in guidedrelationship. The plunger is urged to its upper limit of movement by aspring 54. p 7 v The base 12 has a concentric, relatively thick'circularportion 20 formed therein as defined by sector-shaped recessed portions22 in the base. A concentric circular shallow basin or cup 24,preferably with vertical side walls 26, is provided in the top of thebase 12 for receiving therein the molten alloy metal from which the malereverse or counter die is to be formed. The annular outer dependingflange 28 and the relatively thick central portion 20 thus ensure afirmv foundation :for the die stamp without the need for uniformsolidity which would add to the weight and expense of the base.

As best seen in Fig. 2, a pair of laterally extending spaced aparttrunions or journal posts 30 and 32 are formed preferably integrallywith the base for receiving a hinged flange 34 formed integrally withthe cover 14 therebetween and a hinge pin 36 is inserted through thejournal posts and hinge flange so that the cover 14 may 4 be pivotedinto overlying relationship with the base as shown in solid line of Fig.1 or moved outwardly to expose the base as shown in broken lines 37 inFig. 1.

The hinge flange is recessed at 38 so that the outer edge 40 of the base12 will not come into engagement therewith when the cover is in theclosed position or moved toward the closed position. Between the posts30 and 32, the flange is provided with a protuberance or shoulder stop42 formed integrally therewith which is adapted to engage with acomplementary construction or stop 44 formed integrally with the base.The two stops engage when the cover is in the elevated position as shownin broken lines in Fig. 1. Accordingly, the cover, when opened, will beprevented from pivoting backwardly and downwardly far enough to disturbthe levelness of the base 12 and spill molten material containedtherein, yet the cover is in a position where it can be closedimmediately when the metal is at the right temperature ready for the diestamping operation to be made.

The guide boss 16 projects vertically and concentrically above thedome-shaped cover 14 and perpendicularly to the base 12 when the coveris in the closed position of Fig. 1. This construction thus holds theplunger 18 so that it is guided downwardly in perfect perpendicularalignment with the shallow basin'24 as will be hereinafter described. Toassure this throughout long .years of use, the boss is recessedcentrally at 46 to receive therein a guide sleeve 48 having an annularshoulder 50 seating at the top 52 of the boss so that the plunger shaft18 may be guided along an even greater portion of its length tostabilize the vertical alignment to the basin as described. The'guide'sleeve also serves to position the helical spring 54 inconcentric relation with the shaft 18 as supported at one end on theboss 16 at the other end against a plunger handle 56.' The handle 56 maybe secured to the shaft 18 by any suitable means such as the threadedbolt 58 on the upper end of the shaft 18. Thus the entire plunger willbe urged upwardly by the spring 54.

The lower end of the plunger carries an element 59 which receives a bolt60 or other suitable means embedded in the base 64 of a suction cup 62made of resilient material. The base 64 of the suction cup is relativelywider in diameter than the element 59 to provide a shoulder 61 thatsupports the lower end of a helical spring 66 thereagainst. The otherend of the spring 66 is twisted onto the lower end of the plunger 18 asat 69 and serves as a stop for the upward movement of the plunger aswell as assisting downward movement of the plunger, the spring endabutting against an upper wall 63 within the boss 16. The spring-54 is alight one so that the plunger is provided with a counter biasing meanswhich will permit the plunger to be moved downwardly with a quick blowwith relatively little force. The balance afforded by springs 54 and 66also ensures that the plunger will not be impressed into basin 24 withexcessive force.

In the operation of the device a brass die for a notary seal or the like70 is affixed to the plunger by pressing it against the suction cup 62'and the cover is raised to the position as shown in dot-and-dash inFig. 1. Thereupon a suitable amount of molten metal for forming thereverse die is poured into the basin 24 and the cover is repositionedover the base as shown in solid line. Thereupon the plunger is given aquick blow which moves the shaft through the boss 16 in true normalrelationship to the base and snaps the die stamp against the surface ofthe metal 72. The metal under this blow endeavors to flow from under theseal at a high rate, but being stopped and driven back by the wall 26opposes any substantial escape of metal before a perfect image and acounter die of uniform thickness is accomplished.

Any metal which may be splashed out of the basin is thus prevented fromflying into the face of the operator or onto his clothing by the cover14. After the operation is completed and the metal has been hardened sothat the counter die formed in the basin can be removed, the metal onthe dome 14 can be taken oif by use of a chisel or by pounding the topof the cover, the curvature of the dome aiding in this because itpermits a space to be formed between the dome and the molten metaladhering thereto upon contraction of the metal.

In assembling the device the plunger 13 is inserted through therelatively narrow sleeve 48 which is in turn inserted within boss 16.Thcreupon the lower extremity of the shaft receives the upper end of thespring 66 thereon as at 69 as already mentioned. The lower end of thespring 66 is secured to the upper portion of the suction cup 62 by meanspreferably of the element 59 and the bolt 60. Thus the suction cup 62 isreceived in supported relationship to the shaft within the cover 14. Thecover 14 is then pivotally secured to the base 12 by inserting pin 36 inposts 30 and 32 and swaging the ends of the pin.

Having thus described the invention and certain embodiments thereof itwill be readily apparent to those skilled in the art how the objectsmentioned are accomplished and how various and further modifications andchanges may be made without departing from the spirit of the invention,the scope of which is commensurate with the appended claims.

I claim:

1. In a die stamp structure of the character described, a fiat basehaving a relatively small centrally disposed recess therein forreceiving a molten metal, a convex dome-shaped cover hingedly secured tosaid base for movement between an enclosing position overlying the baseand an open position along an edge of the base to provide access to saidrecess, a pair of mating stops provided respectively by said base andcover for limiting the movement of the cover into the open positionthereof to a generally vertical orientation relative to the base, saidconvex cover being equipped centrally with an outwardly extending bosshaving a bearing-equipped passage therethrough vertically aligned withsaid recess when said cover is in the enclosing position thereof, ahandleequipped plunger axially reciprocable in said bearingequippedpassage, a coil spring surrounding a portion of said plunger and biasingthe same outwardly of said cover, a helical spring secured to saidplunger at the inner end thereof and normally abutting an inner surfaceportion of said cover to constrain outward movement of the plunger underthe biasing force of said coil spring, and a suction cup carried by saidhelical spring to support a die thereon for impressing the same into abody of metal contained within said recess when said cover is in theenclosing position thereof and said plunger is pressed downwardly.

2. In a die stamp structure of the character described, a flat basehaving a relatively small centrally disposed recess therein forreceiving a molten metal, a convex dome-shaped cover hingedly secured tosaid base for movement between an enclosing position overlying the baseand an open position along an edge of the base to provide access to saidrecess, said convex cover being equipped centrally with an outwardlyextending boss hav ing a bearing-equipped passage therethroughvertically aligned with said recess when said cover is in the enclosingposition thereof, a handle-equipped plunger axially reciprocable in saidbearing-equipped passage, a coil spring surrounding a portion of saidplunger and biasing the same outwardly of said cover, a helical springsecured to said plunger at the inner end thereof and normally abuttingan inner surface portion of said cover to constrain outward movement ofthe plunger under the biasing force of said coil spring, and a suctioncup carried by said helical spring to support a die thereon forimpressing the same into a body of metal contained within said recesswhen said cover is in the enclosing position thereof and said plunger ispressed downwardly.

3. In a die stamp structure of the character described, a base having arelatively small centrally disposed recess therein having a fiat bottomfor receiving a molten metal, a removable cover for said base to enclosethe base and to provide access to said recess, said cover being equippedcentrally with a boss having a bearing-equipped passage therethroughverticaly aligned with said recess when said cover is in said enclosingposition, a handle-equipped plunger axially reciprocable in saidbearing-equipped passage, resilient means for biasing the plungeroutwardly with respect to said cover, a helical spring secured to saidplunger at the iner end thereof, and means carried solely by saidhelical spring to support removably a die above said recess, saidhelical spring and said means impressing the die into a body of metalcontained within said recess without excessive force when said cover isin the enclosing position thereof and said plunger is struck downwardly.

4. In a die stamp structure of the character described, a base providedcentrally with means for receiving and containing a molten metal, aconvex cover of generally dome-shaped configuration movable between anopen position affording access to said means and a closed positionoverlying said means, a plunger reciprocable through said cover invertical alignment with said means when said cover is in the closedposition, and coil spring carried by the inner end of said plunger forsupporting a die including an element releasably engaging the die, saidspring constituting the sole support between said plunger and said diefor relative cushioning movement of said die for impressing the sameinto a body of molten metal contained within the first mentioned meanswhen said cover is in the closed position thereof and said plunger isstruck downwardly.

5. The combination recited in claim 4 in which said element releasablyengaging the die comprises a suction cup of resilient material.

References Cited in the file of this patent UNITED STATES PATENTS 10,438Adams Ian. 24, 1854 340,171 Trimmer Apr. 20, 1866 1,358,648 Nichols Nov.9, 1920 1,385,749 Mueller July 26, 1921 1,453,390 Hellberg May 1, 19231,611,840 Ralston Dec. 21, 1926 1,989,287 Parr Ian. 29, 1935 2,330,274Fiske Sept. 28, 1943 FOREIGN PATENTS 89,997 Austria Oct. 10, 1922420,792 Germany Nov. 2, 1925

